Someone Like You singer Adele was well known for her signature look when she first shot to fame with her incredible voice, thanks to her voluminous hair and sixties-style eyeliner flicks. But the star has made headlines with her appearance in recent months for a very different reason. Adele showed off her seven stone weight loss on Instagram with a birthday snap - and fans dubbed her unrecognisable as they praised her new look.

The dramatic change has wowed the singers fans, after she posted the photo in May following a break from social media.

Adele had last shared a photo at Christmas in 2019, looking notably slimmer - but five months later she revealed the results of her weight loss journey in a little black dress.

The star reportedly used the Sirtfood Diet to help shed the pounds, a diet which focuses on sirtfoods which help to activate the so-called skinny gene.

The specific list of foods contains sirtuins, a group of proteins which have been shown to regulate metabolism.

However, the diet, which was created by two celebrity nutritionists in the UK, also involves a lot of calorie restriction as part of a rapid weight loss plan over the course of three weeks.

READ MORE:Experts behind Adeles diet say pizza and champagne is on the menu

But while Adeles successful weight loss has largely been put down to diet, it seems the star has also been getting fitter as part of her new health kick.

Its been revealed that she regularly goes to pilates classes - and shes not the only famous face to enjoy it.

The LA-based star has reportedly been attending her local class with Meghan Markle, who also loves the calming exercise.

The pair live just around the corner from each other now that Meghan and Prince Harry have set up home in their exclusive Beverly Hills neighborhood.

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A source close to the two famous friends said: "Meghan and Adele have been having Pilates lessons. They are loving it.

"The instructor has also been giving lessons to Harry. It's a great stress-buster," they told the Mirror.

Pilates is a low-impact exercise which helps to build strength and flexibility, and is particularly good for recovering after injury.

Though similar to yoga, it tends to be at a slightly faster pace and has fewer spiritual connotations.

However, its thought to be a very specific type of pilates that the celebrity friends do in order to stay toned.

Adele is said to be a fan of reformer pilates, just like the Duchess of Sussex.

The Hello singer apparently began the classes with The X Factor judge Ayda Field, who is married to Take That star Robbie Williams.

The stars trained with pilates teacher Camila Goodis at the couples swanky LA home.

The all-over body workout uses a machine which adds resistance to the usual pilates movements - making it far more intense.

Meghan Markle has previously revealed she is a fan of the Megaformer, which is an even more advanced reformer pilates machine.

The Megaformer was designed by trainer and CEO of Lagree Fitness, Sebastien Legree, and aims to add cardio to the resistance exercise for a low intensity workout that really makes you sweat.

Meghan has commented before that the class is hands down the best thing you could do for your body, saying that youll notice a difference after just two classes.

As well as pilates, Adele has been working with a personal trainer to get fit - but he said its not just about weight loss for the star.

Pete Geracimo took to Instagram to talk about his work with the singer.

"When Adele and I started our journey together, it was never about getting super skinny, he said.

"It was about getting her healthy. Especially post pregnancy and post surgery.

He noted that they were getting her ready for a gruelling tour schedule after her album 25 was released.

"She embraced better eating habits and committed to her fitness and 'is sweating'! I could not be prouder or happier for her!

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Adele weight loss: Singers royal-approved intense pilates workout that helped lose 7st - Express